blessing



UNITE STATES PATENT OFFICE,

JAMES BLESSING, OF ALBANY, NEWV YORK.

COMBlNED= CHECK AND STOP VALVE.

SPECIFICATION forming part of Letters Patent No. 298,061, dated May 6,1884-.

Application filed December 6, 1883. (No model.)

To all whom it may concern.-

Be it known that I, JAMES H. BLESSING, of

the city and county of Albany, in the State of New York, have inventedcertain new and useful Improvements in Combined Check and Stop Valves,of which the following is a specification.

My invention consists of a novel construction of the valve-casing andthe arrangement of the valves one above the other; and it also consistsin providing said valve-casing with valve-seats-that are both renewableandinterchangeable, as hereinafter set forth. 7

The object of my invention is to combine in one device a check and stopvalve, and by providing the casing with renewable valve-seats to avoidthe necessity of removing the valvecasing'from a line of pipe when, byuse or other cause, the valve-seats become impaired. I attain theseobjects by means of the construction illustrated in the accompanyingdrawings, which form part of this specification, and in which- Figure lis a longitudinal section of a valve containing my improvements, thescrew-stem being shown in elevation Fig. 2, atransverse sectionthroughthe center line of the same, the valves and parts of the screw-stem andbonnet being shown in elevation; and Figs. 3 and 4, longitudinalsections of two modifications of my invention.

As represented in the drawings, A is the valvecasing, made in globeform, and provided with induction-nozzle a, eduction-nozzle a, upperbranch, 01?, and lower branch, a Said valve-casing contains, as anintegral'part of it, an inner cylindrical valve-chamber, B, that isjoined to said casing'by its upper end, as at b, at the induction side,and by its lower end, as at b, at the eduction side of the valve-casing.An inclined partition, 0, formed between the casing A and the exteriorwall of the chamber B, also connects the two parts, and produces aperfect separation of the induction from the eduction openings,excepting a passage through the chamber B, obtained by reaby the upperannular flange, b

As shown in Figs/1, 2, and 4, the valvecasing is provided with renewablevalve-seats D, that are detachable fromthe casing. Each of saidvalve-seats is composed of aflat annular metallic flange havinga shortcylindrical flange, (Z, on one of its flat surfaces, the inner diameterof the cylindrical flange forming a continuation of the opening throughthe valve- Eis the lower valve, whichin all the airferent constructionsshownserves as a checkvalve, and is a well-known variety of thepuppet-valve. Said lower valve is provided with ears e, which strikeagainst the under side of the flange b and" limit the lift of the valve.

F is the upper valve, which-in the first three figures of thedrawings-is attached, by means ofarevolublejoint,tothelower endof thescrewstem f and forms the stop-valve of the device;

but, as shown in Fig. 4, the valve F is separated from the screw-stem f,so as to adapt it to act I either as a supplementary check-valve or asastop-valve, and for this purpose the valve F is provided with a stem,f,whichwhen act'- ing as a check-valve-is guided by an opening formed inthe lower end of the screw-stem f,

the latter being so arranged that it can be screwed down to confine thevalve F to its seat when in use as a stop-valve.

G is a cap or bonnet fitted to screw into the upper branch, c of thevalve-casing. Said cap is provided with the usual stuffing-box, g, forthe screw-stem f, and has an internallyscrew-threaded portion, thatserves as a nut for the said screw-stem.

As shown in Figs. 1, 2, and 4, the lower part of the cap G has the formof a sleeve, which contains the. openings g that communicate with theeduction-opening of the casing A. Said openings are separated by bars 9that connect with an annular flange, g, which forms an integral part of.the cap G, and which bears upon the upper elastic packing, H, for thedou ble purpose of forming a tight joint at that point and securing theupper valve-seat D in place.

As shown in Fig. 3, the lower end of the cap G- terminates in the usualscrewed portion for securing it to the casing A.

I is the cap for the lower branch of the easing A. It is provided with aguide, 5, by means of which the lower valve, E, is guided, and, as shownin Figs. 1, 2, and 4:, the upper part of said cap has the form of asleeve,which contains the openings '17, that communicate with theinduction-opening of the valve-casing. The bars 1" separate saidopenings and connect with the annular flange i, which bears against thelower elastic packing, H,- and performs the same duty as hereinbeforedescribed in respect to the flange g of the upper cap.

In the modification shown in Fig. 3 the parts i, 2 and i" are dispensedwith.

It will be seen that the upper and lower valve-seats D are formedexactly alike; but they are placed in reversed positions, so that thevalves E and F have their bearings upon opposite sides of theirrespective valve-seats. By this arrangement, when the valve-seats becomeworn or cut on one face, the two seats may be interchanged, so as topresent new bearings for the valves to seat on until the seats D, oreither of them, become too worn for further use, when new ones can beinserted at a very slight cost.

I claim as my invention 1. In a combined check and stop valve, theco1nbination,with a valve-casing containing an inner valve-chamber and apartitionformcd between said casing and the wall of its innervalve-chamberfor separating the induction and eduction openings of saidcasing, the said inner valve-chamber being provided with two valve-seatsarranged one above the other, as herein described, of two independentvalves entirely disconnected from each other, and arranged as herein setforth, the lower of said valves being always free to operate as acheckvalve, and the upper one being provided with means whereby it canbe forcibly retained upon its valveseat, as and for the purpose hereinspecified.

2. The combination, with a valve-casing, A, containing an innervalve-chamber, B, and a partition, 0, formed as herein described, of theremovable valve-seats'D and caps G and l, constructed substantially asdescribed, and adapted to secure the valve-seats D, asherein specified.

8. The combination,.with a valve-casing, A, adapted to contain twoindependent valves, substantially as herein described, of the removableand interchangeable valve-seals 1), each consisting of a llat annularflange pro vided with a cylindrical flange, (I, as and for the purposespecified.

JAMES H. BLESSING.

\Vitnesses:

\VM. H. Low, (Hus. \VM. illun'ns.

